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Found 32 results

  1. Poly Carve SOP

    http://www.patreon.com/posts/31506335 Carves out polygons using a point attribute with the ability to define the carve values per primitive using primitive attributes. Pure VEX implementation, 10x faster than the default Carve SOP (compiled). It preserves all available attributes. It supports both open and closed polygons.
  2. I'm running into an issue. I'm using the convert node to change my wires to NURBS. However, when I render these out it renders them as if the conversion hasn't happened. Is there a good reason as to why this is happening?
  3. Mesh from Lines (leaf)

    Sup guys, What would be the best way to create a mesh from these lines? Scene file attached Leaf_v0102.hip
  4. How do I skin connected curves?

    Hi all, I have a more comlex issue to solve but have essentially boiled it down to not being able to skin a curve that splits off like the T junction shown below. How would i be able to skin the curves shown whilst maintaining the flow and connection of the curve? Thank You all SkinningCurvesProblem.hip
  5. Branching curve?

    Hey everyone I am making a road system that dynamically deforms the terrain and for the most part it works great however every individual street is its own curve then merged and fused together. The problem is I will end up with 100's of curves and if I want to go back and adjust a point I have to go through all of them to find the right curve then adjust the 1 point. What Im looking for is a way to have a single curve node that branches off like in the image. Does anything like this exist or is there a solution so I dont have 100's of different curve nodes? Thanks!
  6. Smoothing 90 degree curve turn

    Hello, magicians I'm new to houdini, but I have a task that I decided to tackle in houdini this time, seems fitting. I apologize in advance if this topic was covered, my searches didn't result in anything. Please take a look at the attached image, mainly the lines, their forms. My task is to create a system that will generate random line pattern of this sort. If you could point me in the right direction as far as how to achieve 90 degree turn smoothing in a constant manner, ignoring the length of the curves creating the turn (where smoothing the curve doesn't seem to give constant results, obviously), also the way lines are built, with such distances, my first thought was algorithm similar to Entagma tutorial (http://www.entagma.com/vex-space-filling-curves-aka-that-windows-95-screensaver/), but I don't really understand how to adapt it to create patterns I am after. Thank you for any tips, every advice is appreciated. Vadym
  7. Hi guys, Is there any way to export curves from houdini apprentice?
  8. Roll-up curve

    Hi there, here is my attempt to solve "Roll-up Curve" in single wrangle node scene file available on Patreon: https://www.patreon.com/mkgrafics RollnRoll_1_1_1.mp4 RollnRoll_3.mp4 parameters.mp4
  9. Curves Boolean

    I'm kind of new to houdini so this question maybe very simple but I just couldn't find away to do it. how can I combine 2 curves into one and get just the outline like the image attached. I need to use it in a sweep SOP as backbone. I tried the Boolean SOP but it didn't work. Thanks Ali
  10. Good day everyone! I have another problem: cannot extrude multiply edges\curves (which set in SOP as primitives) in one direction. I quess it's cause of vertices direction, but while I used attribVOP... that didn't help. That trouble appears after "resample" node (but I need this node in exact order of my pipeline). I attach current result of "extrude" node and another image, where edges has been extruded properly (to one direction): Thank you
  11. In Houdini 16 when you drew a curve, you would get a handy tool that would show a dot on the XZ plane so you could see where on that plain you were placing your CV points and a vertical line from that dot to where you would be placing in the Y direction. This was great for allowing you to get a representation of 3D space on a 2D screen. As of 16.5 the curve drawing tool doesn't seem to have these visualisations enabled, making curve drawing rather frustrating. Is anyone able to tell me if it is possible to enable this feature, or if it was removed, or if it is just a problem with my setup? Picture: This is what it used to look like when you drew a curve. [attach]Screen Shot 2018-08-01 at 11.04.22 am.png[/attach] Thanks!
  12. Stylised Trails

    Hi Guys, I need a little advice. I am trying to create trails that have a look similar to the image below. My initial thought was to scatter points on a circle with an initial velocity and then advect them through a volume using curl noise...before using an add sop to group by id (Hip file attached). I am having difficulty trying to replicate the look and feel of the trail animation in the video below at 0.24. The trails appear very wispy and almost fluid like. If someone can help point me in the right direction that would be greatly appreciated. Many thanks, Clive Test_Curves.hip
  13. Curves/Shape From Points Help

    Hey guys, so I'm taking some geo - - deleting away everything but the boundary points - in order to then create an edge using the ADD sop - take this and create polygons inbetween Currently I cant get the winding order/connecting order of my points right on more complex shapes with holes inside as such, heres my hip file any ideas or suggestions would be great! Thanks, C HoudiniHelpAddSop.hip
  14. Hi, I'm looking to procedurally grow a wire sculpture similar to the one in the photo I can do vein growth and space colonization fairly well, but I'm not sure how to create this wrapping around style Any ideas? Cheers
  15. Im trying to deform a curve with vex. I want to deform it with a sin function. Kinda rookie on vex but i thought this would work. I create a curve with just a start and end point. Resample it to say 50 points. Add a attributeWrangle and add this vex code: @P.y = sin(@P.y * 500) * 0.1; I get no errors in the code but i dont get any result at all either. Anyone got any clue? I tested alot of different numbers just to make sure it wasnt the size of the sin curve but i get nothing.
  16. Recreate arc curve from two circles

    Hey, I would ideally like to have this all happen in Vex rather than the set I have made here. This would allow it to be more scalable, but perhaps I can save that for my next problem. Right now I am wondering how I go about recreating the curve I have outlined in pink on the image? Any ideas would be a big help as I'm really stuck. Thanks Metaball Arc_Circles_A_01.hip
  17. Importing Curves from Maya

    Hey, I need to simulate some curves that will be used on a groom in maya. 1500 curves to be exact. I exported the curves from maya to an alembic cache. I loaded the curves in houdini. How ever, for some reason the performance was really slow causing the viewport to lag. So I saved the curves out as a bgeo and re-imported them. However, it is still very slow (orbiting camera in viewport/doing any operation in viewport). What can I do to speed things up? Could it be slow because houdini is reading from a file and the curves are not actually part of the scene file? Thanks
  18. Hello Guys, I am wondering if anyone can help me get my head around a little problem. I have a subdivided mesh being generated with a for each loop, similar to the Entagma setup, with an ends sop set to unroll. I would like to select a point on said mesh then have each point draw a line to its subsequent neighbour, repeating this processes until the whole mesh is formed...creating a kind of growth effect. I would also like to add some randomness to the speed of the connection on a per point basis. Now I have tried to achieve this a few different ways but I just can't seem to pull this off. Any help will be greatly appreciated. Thanks, Clive Growing_lines_between_points.hipnc
  19. Houdini FX artist specializing with hair and curves generations is needed for on-site contractor work in the Silicon Valley / Los Angeles area. Must have the ability to work within a VRay/Maya pipeline and create, rig and control intricate patterns like below: https://vimeo.com/59736707 Please send demo reel and examples to: joelangmuir@gmail.com and I will forward to my manager and recruiting.
  20. Turn vel streamers into usable curves

    I want to jack the streamer visualizations from my fluid source and use it to extrude shapes along. Is this doable? I want to do this because of how cleanly the streamer lines are distributed within a volume.
  21. Hi! I'm following a tutorial and I found somthing rather annoying, in the video when the user sets alpha to be zero the curves (NURBS) go totally transparent but if I do the same I can see how the Alpha is going down but when it gets to zero the curves go full bright color, if I go until something like 0.001 it shows as expected (almost 0 visibility) all of this in the working viewport. I guess it is a display preference or something like that but I failed looking up for that toggle. Hope that anyone knows what is happening. Pardon my bad english and Thanks!
  22. Hello dear community, I'd like to build a simple HDA that lets me build a street from a curve. I'd like to have it configured in a way, that I get the same controls as we get for the Curve-Shelftool. I already found a handle called "curvepointoptions" which only lets me modify existing points. However, what I am trying to do, is to start from a blank state with all the options. Can anybody tell me how to properly setup such a tool? I already dug into the documentation, but I still can't make any sense of it. All the best, Nicolas
  23. soap sim texture

    Hello! stuck a little, need help! reference https://www.shutterstock.com/en/video/clip-9239504-stock-footage-soap-texture.html?src=rel/9239561:1/3p I did a lot of tests with pyro and flip sims and came to almost what i want. biggest problem with pure fluid simulations - mixing of colors, resulting dirty one color, i abandoned this method. solution was to make particle advection while fluid simulations and it was good, but not enough detail. 1. to add details i have included 'add' and resample lines every frame, after 400-500 frame sim time makes me sad.. 2. there are still "black holes" (img) 3. points gives dirty render anyway. soap_effect_v01.hip soap_effect_v01.hip
  24. Hey guys, Kinda Intermediate at Houdini and a recent full time convert from the 3DSMAX/TP world. I have been working on a tool, where the user can easily plug-in curves and generate art direct able particle flow along the input curves. Its about 90% done, and it works great with curves that are not too close to each other or don't intersect each other at too many points. How ever in certain scenarios. like multiple inward spiral curves intersecting each other, since the POPVOP system is based on Particle Cloud Search : - PC Open to look for particles close to the curve points. - Use those points and push them along the length of the curve using the curve tangents. , the particles get attracted towards either curve based on the search radius and no. of search points. This is definitely understandable, on why its happening. But is there any way to lock/tie the particles to specific curves only? The Radius and No. of Points parameters give it a lot of control for most scenarios, but the one mentioned above. Obviously there are a lot more parameters that i have added for dictating the flow behaviour. But the main solution that i can think of is to have the “found” particle only follow the curve and be affected by the parameters along that curve ONLY. Maybe have a POPVOP decide groups for the curves/particles? TLDR; Need to make the particles only flow along the curve it chooses/gets attracted to at the beginning. I have never worked with groups in POPNET, so im pretty much lost. Unfortunately because of my limited knowledge at Houdini i haven't been able to figure out how to achieve this. Would really appreciate some help on this.
  25. Hello everyone. I am working on a growing vines effect with the use of L-system. I want my L-system to be deformed by the curve and controlled with carve SOP. I have set up the initial network, however the main problem I encounter is the fact that the leaves anchor points are deformed in the way that it doesn't match the L-system branches. (see the screengrabs) Non-deformed L-system Deformed L-system with non-matching leaves I attached my hip file, any help would be appreciated: growing_lsystem_vines_01.hipnc
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